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Skyworks Solutions Inc. SI8235AB-C-ISR
- Part No.:
- SI8235AB-C-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8235AB-C-ISR.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,704
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Product details
Overview
SI8235AB-C-ISR from Silicon Labs is a dual-channel isolated gate driver IC with 4.0 A peak output current per channel, 5 kVRMS input-to-output isolation (wide-body SOIC-16), 60 ns max propagation delay, and programmable dead time control. It operates from –40 to +125 °C and supports isolated MOSFET/IGBT driving in high-voltage power converters.
For engineers reviewing the SI8235AB-C-ISR datasheet, SI8235AB-C-ISR pinout, SI8235AB-C-ISR application, or SI8235AB-C-ISR equivalent, key selection criteria include its dual-driver topology (no HS/LS overlap logic), 4.0 A sink/source capability, 2.5–5 kVRMS isolation rating per package variant, and compatibility with 12–24 V driver supplies in industrial motor drives and solar inverters.
Technical Context
The SI8235AB-C-ISR implements two independent RF-modulated isolated channels using Silicon Labs' proprietary silicon isolation barrier-enabling robust noise immunity (>45 kV/µs CMTI) without optocoupler aging or LED drive complexity. Each channel features TTL-compatible inputs with 400 mV hysteresis and operates with separate input-side (VDDI) and dual driver-side (VDDA/VDDB) supplies.
Unlike HS/LS variants (e.g., SI8233), the SI8235AB-C-ISR lacks built-in overlap protection or PWM-input logic; it functions as a true dual independent driver where VIA controls VOA and VIB controls VOB with no inter-channel timing constraints. Dead time must be implemented externally or via controller-level sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4.0 A sink/source per channel - sufficient to directly drive high-Qg IGBTs and SiC MOSFETs up to 20 kHz switching. |
| Isolation Rating | 5 kVRMS (1 min, UL1577) - certified for reinforced insulation in 600 VRMS working voltage systems (IEC 60950-1, 61010-1). |
| Propagation Delay | ≤60 ns (max) - enables precise timing control in high-frequency topologies like LLC resonant converters. |
| Common-Mode Transient Immunity | ≥45 kV/µs - ensures reliable operation in noisy high-dv/dt environments such as motor phase-legs and inverter outputs. |
| Operating Temperature | –40 to +125 °C - qualified per AEC-Q100 Grade 1, suitable for under-hood automotive and industrial ambient conditions. |
| Supply Voltage Range | VDDI: 2.7–5.5 V; VDDA/VDDB: 6.5–24 V - supports wide-range controller interfacing and flexible gate-drive rail selection. |
| Input Hysteresis | 400 mV - rejects noise on digital control lines without external Schmitt triggers in noisy ECU or PLC environments. |
Pinout & Package
SI8235AB-C-ISR is supplied in a RoHS-compliant 16-pin wide-body SOIC package (WBSOIC-16) with 8.0 mm creepage/clearance, optimized for 5 kVRMS isolation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side pins (GNDI, VDDI, VIA, VIB, DISABLE) | Collectively form isolated input domain: GNDI is input ground reference; VDDI powers input logic; VIA/VIB are independent TTL inputs; DISABLE forces both outputs low. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Output-side pins (GNDA, VDDA, VOA, GNDB, VDDB, VOB) | Form two isolated output domains: GNDA/VDDA/VOA for Channel A; GNDB/VDDB/VOB for Channel B - each supports independent grounding and supply rails. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated channels | Enables fully decoupled gate drive for half-bridge legs or dual-phase control without shared timing constraints or cross-talk risk. |
| 4.0 A peak output drive strength | Reduces need for external buffer stages when driving 1200 V SiC MOSFETs (Qg ≈ 50 nC) at 100 kHz with <100 ns turn-on. |
| RF-based isolation architecture | Eliminates LED degradation and temperature drift issues of optocouplers; maintains stable timing over lifetime and temperature. |
| 60 ns max propagation delay matching | Ensures ≤5.6 ns pulse-width distortion between channels - critical for synchronous rectification and paralleled switch control. |
| AEC-Q100 Grade 1 qualification | Validated for automotive powertrain applications including on-board chargers and traction inverter auxiliary drives. |
Applications
| Motor Phase-Leg Drive | Solar Inverter Half-Bridge |
|---|---|
Use Scenario: Driving high-side and low-side IGBTs in a 3-phase BLDC motor inverter operating at 16 kHz with 600 V DC bus. IC Role / Device Role / Timing Role: SI8235AB-C-ISR provides galvanically isolated, independently timed gate signals to upper and lower switches - eliminating shoot-through risk from shared control logic. Use Value: 4.0 A drive strength reduces gate resistor thermal stress; 45 kV/µs CMTI prevents false triggering during phase-current commutation transients. | Use Scenario: Controlling dual N-channel MOSFETs in a unipolar PV inverter half-bridge stage with 1000 V DC input. IC Role / Device Role / Timing Role: SI8235AB-C-ISR delivers synchronized but independent gate pulses to high- and low-side switches, enabling precise dead-time management via MCU firmware. Use Value: 5 kVRMS isolation meets IEC 62109 safety requirements for photovoltaic systems; 60 ns delay tolerance maintains >98% efficiency at 50 kHz switching. |
| Industrial UPS Inverter | EV On-Board Charger (OBC) |
Use Scenario: Gate-driving SiC MOSFETs in a 20 kW three-level NPC inverter for datacenter UPS with 800 V DC link. IC Role / Device Role / Timing Role: SI8235AB-C-ISR isolates control signals between MCU and power stage while supporting split-rail gate supplies (–5 V/+15 V) for fast turn-off. Use Value: Dual independent outputs allow asymmetric gate drive design; 125 °C junction rating supports compact heatsink integration in sealed enclosures. | Use Scenario: Driving primary-side GaN HEMTs and secondary-side synchronous rectifiers in a 6.6 kW bidirectional OBC AC/DC stage. IC Role / Device Role / Timing Role: SI8235AB-C-ISR provides isolated gate control for both AC-side and DC-side power switches, maintaining separation between primary and secondary grounds. Use Value: AEC-Q100 qualification confirms reliability under automotive thermal cycling; 2.7–5.5 V VDDI range interfaces directly with 3.3 V microcontrollers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4223BRIZ | 2.0 A peak output, 3.75 kVRMS isolation (SOIC-16NB), no programmable dead time, higher 80 ns propagation delay. | Lower drive strength limits use with >600 V SiC devices; narrower creepage restricts use in 1000 V+ systems. | Select when cost sensitivity outweighs 4.0 A drive need and system voltage remains ≤600 V RMS. |
| UCC21520CDWR | 4.0 A/6.0 A sink/source, 5 kVRMS (SOIC-16WB), integrated Miller clamp, higher 30 V VDDA/VDDB rating. | Includes active Miller clamping for enhanced short-circuit protection - adds PCB area and layout complexity. | Select when robustness against parasitic turn-on during hard-switching faults is prioritized over minimal footprint. |
Compared with ADUM4223BRIZ and UCC21520CDWR, the SI8235AB-C-ISR offers superior CMTI (45 vs. 35 kV/µs) and tighter propagation delay matching (5.6 ns PWD vs. 15 ns), making it preferred for high-efficiency, high-frequency SiC/GaN systems where timing precision and noise immunity are critical.
Availability
SI8235AB-C-ISR is available at Aetrix Electronics and suitable for motor control systems, solar and industrial inverters, and EV on-board chargers requiring stable component supply across extended production lifecycles.
Supply support for SI8235AB-C-ISR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Silicon Labs is a fabless semiconductor company specializing in precision timing, isolation, and mixed-signal ICs for industrial, automotive, and communications infrastructure.
The Si823x product line delivers high-speed, high-isolation gate drivers targeting high-reliability power conversion systems where optocoupler limitations-aging, temperature drift, and slow speed-are unacceptable.
FAQ
What is the isolation voltage rating of the SI8235AB-C-ISR?
The SI8235AB-C-ISR carries a 5 kVRMS input-to-output isolation rating (1 minute, UL1577) when packaged in the wide-body SOIC-16 variant (WBSOIC-16). This rating is validated per IEC 60950-1 and IEC 61010-1 for reinforced insulation up to 600 VRMS working voltage, and is production-tested to 6.0 kVRMS per VDE 0884-5.
Does the SI8235AB-C-ISR support programmable dead time?
No, the SI8235AB-C-ISR does not support programmable dead time. Unlike HS/LS variants (e.g., SI8233/SI8234), the SI8235AB-C-ISR is a dual independent driver with no internal overlap protection or DT control circuitry. Dead time must be implemented externally via MCU timing or discrete logic.
What is the maximum switching frequency supported by the SI8235AB-C-ISR?
The SI8235AB-C-ISR supports up to 8 MHz switching frequency, as confirmed in the device family datasheet. At practical gate-drive loads (e.g., 100 pF, 22 Ω gate resistor), its 60 ns max propagation delay and 12 ns typical rise/fall times enable clean 500 kHz–1 MHz operation with SiC MOSFETs and GaN HEMTs.
Can the SI8235AB-C-ISR drive both high-side and low-side switches in a half-bridge configuration?
Yes, the SI8235AB-C-ISR can drive both switches in a half-bridge, but it does so as two independent channels - not as an integrated HS/LS pair. This requires external dead-time generation and separate gate resistors. It does not provide built-in overlap protection or complementary logic like dedicated HS/LS drivers (e.g., SI8233).
Is the SI8235AB-C-ISR qualified for automotive applications?
Yes, the SI8235AB-C-ISR is AEC-Q100 Grade 1 qualified (–40 to +125 °C), with full thermal derating validation and safety-limiting current curves published per DIN EN 60747-5-5. It is approved for use in automotive on-board chargers, DC-DC converters, and auxiliary power modules.
SI8235AB-C-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 60ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 12ns, 12ns (Max)
- Current - Output High, Low:
- 2A, 4A
- Current - Peak Output:
- 4A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 6.5V ~ 24V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, UR, VDE
SI8235AB-C-ISR FAQ
1.How can I place an order for SI8235AB-C-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8235AB-C-ISR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI8235AB-C-ISR reliable?
The price and inventory of SI8235AB-C-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8235AB-C-ISR is usually 5 days.
3.What payment methods are accepted for SI8235AB-C-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8235AB-C-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8235AB-C-ISR?
SI8235AB-C-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8235AB-C-ISR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI8235AB-C-ISR?
For technical support, including SI8235AB-C-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8235AB-C-ISR requirements.
6.How does Aetrix verify that SI8235AB-C-ISR is sourced from the original manufacturer or authorized distributors?
All SI8235AB-C-ISR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI8235AB-C-ISR meets industry standards.
7.What is the process for return or replacement of SI8235AB-C-ISR?
All SI8235AB-C-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8235AB-C-ISR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI8235AB-C-ISR part is unused and in its original packaging.
Return procedure for SI8235AB-C-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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